Carrier Had $100 Million in Cash Held in Venezuelan Currency at March 31

United Continental Holdings Inc. on Friday said it will reduce flights to Caracas from Houston in September, adding to cutbacks by other airlines that say the Venezuelan government owes them more than $4 billion in revenue that it is holding in bolívares, the local currency.

Earlier this week, Delta Air Lines Inc. said it will sharply reduce its flights to Venezuela starting Aug. 1. American Airlines Group Inc., Air Canada, Alitalia SpA and others already have cut back amid a dispute with the Venezuelan government over their...